[英]Issue with displaying dropdown menu as a block in responsive navigation bar
我正在尝试构建一个响应式导航栏。 一切似乎都工作正常,但是一旦缩小屏幕并显示按钮,则单击按钮后菜单无法正确显示。
答案可能非常简单,但我才刚刚起步,似乎无法弄清楚。 我试图修改CSS代码以获得正确的结果,这意味着菜单应该在按钮下方以块显示,但是我尝试的任何方法似乎都没有效果。
我包括了用于导航栏的HTML,CSS和Javascript代码。 救命! 谢谢你们。
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>X</title>
<link href="https://fonts.googleapis.com/css?family=Lato:400,400i,700,700i" rel="stylesheet">
<link rel="shortcut icon" href="images/favicon.ico" />
<link rel="stylesheet" type="text/css" href="styles/main.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div class="topnav" id="myTopnav">
<nav role="banner">
<a href="#">
<img id="topnavLogo" src="images/logo-navbar-white.png" width="240" height="180">
</a>
<ul>
<li>
<a class="page-icon" href="#">Log in</a>
</li>
<li>
<a class="page-icon" href="#">Sign up</a>
</li>
<li>
<a class="page-icon" href="#">About</a>
</li>
</ul>
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</nav>
</div>
<style>
#topnavLogo{
float:left;
color: #fff;
text-align: left;
text-decoration: none;
font-variant: small-caps;
padding-top:-50px;
padding-bottom: 15px;
padding-left: 30px;
margin:-55px;
}
.topnav {
width: 100%;
height: 60px;
background-color: #0008;
line-height: 60px;
position: fixed;
display:inline-block;
}
ul li{
display:inline;
float:right;
}
.active {
background-color: #4CAF50;
color: white;
}
.topnav .icon {
display: none;
}
.page-icon{
color: #fff;
text-align: center;
padding: 5px 5px;
text-decoration: none;
font-size: 17px;
margin-right: 30px;
font-family: 'Lato', sans-serif;
font-variant: small-caps;
}
.page-icon:hover {
color: #9bc0d3;
}
@media screen and (max-width: 600px) {
.topnav li a {display: none;}
.topnav a.icon {
float: right;
display: block;
padding: 0 1em 0 0;
color: #fff;
font-size: 1.5em;
}
.topnav a.icon:hover {
color: #9bc0d3;
}
}
@media screen and (max-width: 600px) {
.topnav.responsive {position: relative;}
.topnav.responsive a.icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
color: #9bc0d3;
}
}
</style>
<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>
</body>
</html>
您正在将display: block
和display: none
设置为<a>
元素而不是其包装器<li>
。
为了使菜单正确显示,您需要添加以下2条规则:
@media screen and (max-width: 600px) {
.topnav ul > li {display: none;}
.topnav.responsive ul > li {width:100%; display: block;}
}
按下小屏幕菜单按钮时,下面的代码使菜单在标题下显示为全角。 在较大的屏幕上时,它充当普通标题。 我还玩弄了标志图像,但显示不正确。
让我知道这是否不是您想要的。
function myFunction() { var x = document.getElementById("myTopnav"); if (x.className === "topnav") { x.className += " responsive"; } else { x.className = "topnav"; } }
body { margin: 0px; } #topnavLogo { float: left; color: #fff; text-align: left; text-decoration: none; font-variant: small-caps; padding-left: 30px; max-height: 60px; width: 240px; height: 50px; margin: 5px 5px 5px 25px; background-image: url('https://via.placeholder.com/240x80.png/09f/fff'); background-size: contain; background-repeat: no-repeat; background-position: left; } .topnav { width: 100%; height: 60px; background-color: #0008; line-height: 60px; position: fixed; display: inline-block; } .topnav ul { margin: 0px; } ul li { display: inline; float: right; } .active { background-color: #4CAF50; color: white; } .topnav .icon { display: none; } .page-icon { color: #fff; text-align: center; padding: 5px 5px; text-decoration: none; font-size: 17px; margin-right: 30px; font-family: 'Lato', sans-serif; font-variant: small-caps; } .page-icon:hover { color: #9bc0d3; } @media screen and (max-width: 600px) { .topnav.responsive a.icon { color: #9bc0d3; } .topnav li a { display: none; margin: 0px; float: none; } .topnav.responsive li a { display: inherit; } .topnav a.icon { float: right; display: block; padding: 0 1em 0 1em; color: #fff; font-size: 1.5em; } .topnav a.icon { position: absolute; right: 0px; top: 0px; padding-left: 15px; } .topnav a.icon:hover { color: #9bc0d3; } .topnav ul { width: 100%; position: fixed; top: 60px; bottom: 0px; right: 0px; background: #0008; display: none; overflow-y: scroll; } .topnav.responsive ul { display: inherit; } nav ul li { width: 100%; } }
<link href="https://fonts.googleapis.com/css?family=Lato:400,400i,700,700i" rel="stylesheet"> <link rel="shortcut icon" href="images/favicon.ico" /> <link rel="stylesheet" type="text/css" href="styles/main.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"> <div class="topnav" id="myTopnav"> <nav role="banner"> <a href="#" id="topnavLogo"> </a> <ul> <li> <a class="page-icon" href="#">Log in</a> </li> <li> <a class="page-icon" href="#">Sign up</a> </li> <li> <a class="page-icon" href="#">About</a> </li> </ul> <a href="javascript:void(0);" class="icon" onclick="myFunction()"> <i class="fa fa-bars"></i> </a> </nav> </div>
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